Description of problem:
We can create users with multibyte characters just fine, and these users can login.  However, when they are logged in, the characters are displayed vertically in the headers, instead of horizontally.  This results in a warped UI

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1.  Admin > Users > New
2.  Create a user with a  login of "我很喜欢吃水煮鱼"
3.  Logout; attempt to login as user "我很喜欢吃水煮鱼"
  
Actual results:
The login name is displayed in a vertical column on the right-hand side of the page. This ends up warping the header UI components.

Expected results:
Need to display these vertically.

Additional info:

See forthcoming screenshot